Jet sizes for six pack

[dan juhasz]

Here is some info

 

[69ChargerR/TSE]

Seems like a trick question

I didn’t see my numbers on the chart

 

[33 IMP]

What Bob was trying to say, is....get a cheap number drill set and use the drill shanks to measure the holes.
Actual measurement is more accurate than a chart imo, cause you don't know what a previous owner did to the metering plates. Besides, the chart I've got doesn't show our carbs!
When I measured mine, it was obvious a p.o. had opened em up. (bigger even than the d.c. manual said to drill em to).
Ran a little fat at wide open throttle, but happy.

 

[Daves69]

Mopar Six Pack Metering Plate 6180 - Allstate Carburetor

Specific metering Plate Stagger Jetted (Different jet holes choke side and throttle side)

allcarbs.com

Mopar Six Pack Metering Plate 6178 - Allstate Carburetor

Mopar Six Pack Metering Plate 6178 is an brand new original zinc cast metering plate. List 4393 Holley number 34R-6178.

allcarbs.com

https://www.crankshaftcoalition.com/wiki/images/e/ef/08_Holley_Catalog_pages_-_90.pdf

 

[BSB67]

I didn’t see my numbers on the chart

They have never been on any Holley published literature that I’m aware of. I believe the older performance bulletins may have it. They were staggered jetting, and smaller than the 70-71 carbs plates.

 

[1968rt]

No 34 plate.....122 53

 

[BSB67]

No 34 plate.....122 53

I’m not sure what you’re trying to convey here. But this is not the jetting the carb came with.

 

[Mopar Miki]

Bob, i bet i can make your six pak run better...but i don't work/provide technical support for free anymore.
Fuel pressure is critical and no you do not need more than 6 psi.
Float levels, operating temp, lot's of details.
As far as jetting typically no more than a 64 in the ctr even in 505 alum head BB monster engines.

 

[Daves69]

No 34 plate.....122 53

'69s had completely different style plates.

FWIW, my '70 auto setup had the 34 plate in the front carb and the 35 in the rear......

 

[1968rt]

I’m not sure what you’re trying to convey here. But this is not the jetting the carb came with.

I never said the carb came with jetting. I copied this chart from the Holley website years ago. I would say it just shows a jet equivalent for the orifice in the plate. Maybe someone has actually measured them. Same chart is used here:https://www.motortrend.com/how-to/148-0403-jet-set-conversion/

 

[69ChargerR/TSE]

Bob, i bet i can make your six pak run better...but i don't work/provide technical support for free anymore.
Fuel pressure is critical and no you do not need more than 6 psi.
Float levels, operating temp, lot's of details.
As far as jetting typically no more than a 64 in the ctr even in 505 alum head BB monster engines.

So, 6 psi is fine? And not the HEMI/Six pack 8psi?

 

[Bird 426]

I have mine at 5psi. My plugs were always black and sooty at 7.5. If you turn it down, recheck your float levels, they will go down.